The study will compare the effect of Aspirin versus clopidogrel effect on uterine perfusion in women with unexplained recurrent pregnancy loss with decreased uterine artery pulsatility index. Null hypothesis: Women with recurrent miscarriage have the same blood flow after aspirin or clopidogrel treatment compared to their uterine artery pulsatility index before treatment.
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Improvement in uterine artery pulsatility index
Timeframe: 2 months